I had an iPad 2 WiFi - work supplied since 2011. What a revelation - used primarily in the classroom/studio to supplement moving to online delivery.
Fast-forward to Sept 2015, the iPad 2 was as functional the day I started using it and in the end a little slow, but still worked like a trooper.
I picked up the latest iPad Air 2 WiFi & Cellular, after the better half - using the iPad Air 1 and couldn't be happier.
Faster, lighter and work covered the cost!